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Reloading Techniques For Reloading


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257 weatherby mag load data.

 
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  #15  
Old 07-01-2013, 09:07 PM
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Re: 257 weatherby mag load data.

going to pick up some RL 25 for mine tomorrow, anybody got a pet charge for that powder ?
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Weatherby Vanguard 7mmx300win
Weatherby Vanguard 277 Magnum (awaiting assembly)
Weatherby Vanguard 257wby
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  #16  
Old 07-01-2013, 11:42 PM
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Re: 257 weatherby mag load data.

W/RL25, I would start around 71-72 gr and work up from there. Usually max is found to be around 74.5 to 75.5 gr. I think the best accuracy I got was around 3400 fps. I think I ran them as fast as 3450. I was using WBY brass, Fed 215M, OAL 3.250 in a vanguard sub-moa. its a 24" bbl. So if you have a 26" bbl you'll see a little more speed probably.
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  #17  
Old 07-02-2013, 10:34 PM
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Re: 257 weatherby mag load data.

I have the same rifle and wby brass so I should end up close to the same thanks for the data
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Weatherby Vanguard 277 Magnum (awaiting assembly)
Weatherby Vanguard 257wby
Savage LRH 6.5x284
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  #18  
Old 10-04-2013, 07:39 PM
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Re: 257 weatherby mag load data.

Quote:
Originally Posted by mrultramag View Post
W/RL25, I would start around 71-72 gr and work up from there. Usually max is found to be around 74.5 to 75.5 gr. I think the best accuracy I got was around 3400 fps. I think I ran them as fast as 3450. I was using WBY brass, Fed 215M, OAL 3.250 in a vanguard sub-moa. its a 24" bbl. So if you have a 26" bbl you'll see a little more speed probably.


What bullet weight for this data?
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